Ideally, late fall into winter, although with care and proper after transplant attention, you can do it any time. Sometimes it's just not possible or practical to wait ;-)

FWIW, ceanothus are not enthusiastic about being transplanted......just saying.

It's all about the rootball and what Gardengal said above. A year and a half in the ground is not a long time. They should all still have a good rootball.
The new growth on the rhododendron can wilt, and when re-hydrated can have a U shaped bend in it that won't straighten out over time. Not a real big deal, but can happen. Yes, the Ceonanthus resents transplanting anytime. Usually it sets them back a bit. The hydrangea looks like a safe bet for moving now, especially with this cool, cloudy weather.
Myself, I'd move them all now and water em' in good.
mike

The ceonathus is doing the best out of all of them actually. I might need to do more research on the rhodie it's getting rather sparse looking... The ceonathus looks like a creeping one but it's supposed to get over 10 feet tall, so it's a bit weird to me, I'm not an expert on pruning by any means...

Anyway, thanks for the tips!

Unless installed in poor condition all should have rooted out well by this point starting with the first autumn after planting. So you could have wilting - or worse - if you cut through the outside of the roots while digging them up now, a really poor time of the year to be doing it. Since exceeding the planting space is a long term issue, with none of them being likely to explode out of bounds this summer you should just wait until next winter to deal with it.

'Victoria' may be the same as 'Skylark', the latter of which is described as growing 4 feet tall and 6 feet wide in a recent book written by ceanothus experts. However, a plant obtained as 'Victoria' I planted in a patch of salal under a high branching Douglas fir on Camano Island several years ago is already well above my head. So 10 feet may be possible in a good spot, otherwise many other plantings of this locally common shrub do not look like they are going to get that high anytime soon, if ever.

Many rhododendrons in this region are having problems with powdery mildew and lace bugs etc. these days, if you examine the leaves of yours closely you may find it is infested with something and being made gaunt by that.

Also stem and root infestations by water molds can make top growth poor, the former is often what makes some plants look lumpy and dwarfed. The latter can cause branches to blight off or kill the whole plant.

So I finally took a pic of my sad little rhodie, I suppose I should wait to transplant it till it gets a little better? I'm not even sure what's wrong with it? Drainage issues or soil quality is my guess. Maybe transplanting it into a hole filled with some better quality soil would be a smart thing? Any tips would be appreciated!

Since it is concentrating green at the branch tips it probably just needs to be fertilized. Be sure the soil is moist before doing this and kept moist afterward. And use a product labeled for rhododendrons.

Also if it were mine I would move it away from what looks to be a more or less sunny house wall and use the space for another kind of shrub that would appreciate the reflected heat.

I plan to move it further out, but that area gets mostly shade. Thanks for the input! I think you're right ;)

It's just shedding it's lower leaves. The new growth looks pretty good, but a little short, indicating maybe it needed more water this growing season.

I would guess it blooms a lavender color.

Mike